Question

plz help me for doing this!​

Answer 1

Answer:

sorry i don't know........

Answer 2

Answer:

One mark question

1. Displacement can be zero even when distance is not zero. Displacement = Minimum distance between final(B) and initial position(B) = 0.
2. No, the distance travelled by an object can be more than or equal to the magnitude of its displacement
3. If a particle is moving with a uniform velocity . Then it's acceleration is Zero . Acceleration is defined as the rate of change in velocity
4. Speed of body = slope of distance time graph
5. d = rt which means distance equals rate times time. distance = rate x time. To solve for speed or rate use the formula for speed, s = d/t which means speed equals distance divided by time.
6. The one thing which is common in their motion is the center
7. of gravity which acts on the brick as well as the elephant. Also they will fall on the ground at the same time in case the air resistance is missing
8. Zero
9. Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
10. This type of motion is defined as the motion of an object in which the object travels with varied speed and it does not cover same distance in equal time intervals, irrespective of the time interval duration

Two marks ques.

1. A quantity that has magnitude but no particular direction is described as scalar. A quantity that has magnitude and acts in a particular direction is described as vector.
2. Retardation is the acceleration which acts opposite to the direction of the motion of the body which causes decrease in the velocity of the moving body. Thus it slows down the moving body. Acceleration is defined as change in velocity
3. No, a body can not have its velocity constant, while its speed varies. Rather, it can have its speed constant and its velocity varying. For example in a uniform circular motion. The velocity of an object can be changed by: Change of speed and Change of direction
4. Uniform circular motion is accelerated because the velocity changes due to continuous change in the direction of motion. ... The change in velocity gives rise to an acceleration in the moving body. Therefore circular motion is an acceleration motion even when the speed remains constant.
5. Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.